Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...421..412w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 421, no. 2, p. 412-433
Astronomy and Astrophysics
Astronomy
232
Cosmology, Quasars, Red Shift, Sky Surveys (Astronomy), Stellar Color, Stellar Luminosity, Stellar Mass, Stellar Models, Galactic Evolution, Schmidt Telescopes, Stellar Evolution
Scientific paper
In two previous papers we presented the aims, methods, and spectroscopic results, and computed the completeness of a six-band multicolor survey for high-redshift quasars, covering an effective area of 43.0 sq deg, to mor = 20.0. In this paper the complete sample of 86 quasars 2.2 less than or equal to z less than 4.5 is combined with other published samples to determine the continuum and line luminosity functions, phiC, phiL, over the redshift range 2.0 less than or equal to z less than 4.5. The estimate of the completeness of our multicolor sample has been revised following the development of a more sophisticated treatment of the line and continuum absorption from intervening matter, and the incorporation of the effects of quasar variability. Appendices describe the new model procedures. The luminosity function calculation also accounts for the range of line strength and continuum spectral index as well as the photometric errors. The results are presented in terms of two magnitudes, MC(1216) and ML(1216), which are logarithmic measures of the absolute continuum flux under the Lyman-alpha/N v emmision line, and of the Lyman-alpha/N v line luminosity. Additionally the intrinsic distribution of continuum spectral indices alpha is derived. This completes the parameterization of the rest-frame UV spectral-energy distributions of the quasar population, in the four dimensional space with axes MC(1216), ML(1216), alpha, z.
Hewett Paul C.
Osmer Patrick S.
Warren Stephen J.
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